Method and magnetic resonance apparatus for echo planar imaging with data entry into k-space along a zigzag trajectory

a magnetic resonance imaging and data entry technology, applied in the field of echo planar magnetic resonance imaging, can solve the problems of image distortion, limit the possible resolution, and further technical requirements of mr apparatuses and epi imaging to be comparabl

a magnetic resonance imaging and data entry technology, applied in the field of echo planar magnetic resonance imaging, can solve the problems of image distortion, limit the possible resolution, and further technical requirements of mr apparatuses and epi imaging to be comparabl

US20140197834A1Active Publication Date: 2014-07-17MAX PLANCK GESELLSCHAFT ZUR FOERDERUNG DER WISSENSCHAFTEN EV +1
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  • Method and magnetic resonance apparatus for echo planar imaging with data entry into k-space along a zigzag trajectory
  • Method and magnetic resonance apparatus for echo planar imaging with data entry into k-space along a zigzag trajectory
  • Method and magnetic resonance apparatus for echo planar imaging with data entry into k-space along a zigzag trajectory

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Embodiment Construction

[0097]Hereinafter, the present invention is illustrated by means of preferred embodiments and with reference to the drawings. In the figures, like reference numerals denote like elements. In the figures, techniques for EPI MR imaging are described. In general, the techniques according to various embodiments of the present invention allow implementing zigzag-type trajectories having well-defined and specific parameters, e.g., curvature and inclination and / or distance of the flanks, for the acquiring of raw data. In particular, these techniques allow implementing zigzag-type trajectories for the acquiring of raw data which have flanks with comparably small curvature, i.e., particularly linear flanks. Such trajectories are referred to as ideal zigzag-type trajectories hereinafter, wherein it should be understood that particular technically caused deviations, respectively small residual curvatures can be present. Further techniques for the application of PPA methods, i.e., parallel imag...

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Abstract

In a method and apparatus for echo planar magnetic resonance (MR) imaging sequence of phase encoding gradient fields and a sequence of readout gradient fields are applied in order to produce a well-defined zigzag-type trajectory for entering raw data into k-space. Zigzag-type trajectories can be achieved that have flanks without curvature, or without significant curvature. Cartesian methods for image reconstruction of parallel MR imaging are applied to echo planar MR imaging with such zigzag-type trajectories.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention concerns a method for echo planar magnetic resonance imaging wherein raw data are acquired (entered into k-space) with a zigzag-type trajectory, as well as a magnetic resonance apparatus for implementing such a method. In particular, the invention concerns applying a certain series of phase encoding gradient fields, which enable the zigzag-type trajectory. The invention also concerns techniques for parallel imaging employing the zigzag-type trajectory.[0003]2. Description of the Prior Art[0004]Magnetic resonance (MR) tomography is an imaging modality that enables acquisition of two-dimensional or three-dimensional image data sets that allow structures in the interior of a patient to be shown in an image with a spatial resolution. MR data are acquired by operating an MR data acquisition unit magnetic to align magnetic moments of protons in a patient in a basic magnetic field or main magnetic field (...

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Application Information

Patent Timeline
17 Jul 2014
Publication
US20140197834A1
IPC
G01R33/48
CPC
G01R33/4818; G01R33/4824; G01R33/5611; G01R33/5616
Inventors
PORTER, DAVID ANDREW; HEIDEMANN, ROBIN